INTEGRATED CIRCUITS DATA SHEET 70 W high efficiency power amplifier File under Integrated Circuits, IC01 1998 Apr 07
FEATURES Very high output power, operating from a single low supply voltage Low power dissipation, when used for music signals Switches to low output power at too high case temperatures Few external components Fixed gain Differential inputs with high common mode rejection Mode select pin (on, mute and standby) Status I/O pin (class-h, class-b and fast mute) All switching levels with hysteresis Diagnostic pin with information about: Dynamic Distortion Detector (DDD) Any short-circuit at outputs Open load detector Temperature protection. No switch-on or switch-off plops Fast mute on supply voltage drops Quick start option (e.g. car-telephony/navigation) Low (delta) offset voltage at the outputs Load dump protection Short-circuit safe to ground, supply voltage and across the load Low power dissipation in any short-circuit condition Protected against electrostatic discharge Thermally protected Flexible leads. GENERAL DESCRIPTION The is a monolithic integrated 70 W/4 Ω Bridge-Tied Load (BTL) class-h high efficiency power amplifier in a 17-lead DIL-bent-SIL plastic power package. The device can be used for car audio systems (e.g. car, radio and boosters) as well as mains fed applications (e.g. midi/mini audio combinations and TV sound). QUICK REFERENCE DATA Test conditions: V P = 14.4 V; R L =4Ω; R s =0Ω; f = 1 khz; T amb =25 C; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT V P supply voltage operating 8 14.4 18 V non-operating 30 V load dump 45 V I q(tot) total quiescent current on and mute; 110 150 ma R L = open circuit I stb standby current standby 1 50 µa V OO output offset voltage on and mute 100 mv V OO delta output offset voltage on mute 30 mv G v voltage gain 25 26 27 db Z i(dif) differential input impedance 90 150 kω P o output power THD = 0.5% 45 55 W THD = 10% 60 70 W THD total harmonic distortion P o =1W 0.03 % P o =20W 0.06 % DDD active 10 % SVRR supply voltage ripple rejection on and mute 60 70 db CMRR common mode rejection ratio on 70 80 db ISRR input signal rejection ratio mute 80 90 db V n(o) noise output voltage on 100 150 µv 1998 Apr 07 2
ORDERING INFORMATION PACKAGE TYPE NUMBER NAME DESCRIPTION VERSION DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1 BLOCK DIAGRAM handbook, full pagewidth C1 C1+ 3 5 V P1 V P2 9 10 status I/O 16 CLASS-B CLASS-H FAST MUTE TEMPERATURE SENSOR LOAD DUMP PROTECTION mode select 4 STANDBY MUTE ON disable LIFT-SUPPLY CURRENT PROTECTION IN+ IN 1 2 75 kω 75 kω + PREAMP FEEDBACK CIRCUIT PREAMP + POWER- STAGE V P * POWER- STAGE LOAD DETECTOR DIAGNOSTIC INTERFACE DYNAMIC DISTORTION DETECTOR 7 8 11 OUT+ diagnostic OUT V ref signal GND 14 17 15 kω reference voltage disable V P * LIFT-SUPPLY TEMPERATURE PROTECTION 15 13 6 C2 C2+ PGND1 12 PGND2 MGL264 Fig.1 Block diagram. 1998 Apr 07 3
PINNING SYMBOL PIN DESCRIPTION IN+ 1 signal input (positive) IN 2 signal input (negative) C1 3 negative terminal of lift electrolytic capacitor 1 MODE 4 mode select input C1+ 5 positive terminal of lift electrolytic capacitor 1 PGND1 6 power ground 1 OUT+ 7 positive output DIAG 8 diagnostic output (open collector) V P1 9 supply voltage 1 V P2 10 supply voltage 2 OUT 11 negative output PGND2 12 power ground 2 C2+ 13 positive terminal of lift electrolytic capacitor 2 V ref 14 internal reference voltage C2 15 negative terminal of lift electrolytic capacitor 2 STAT 16 status I/O SGND 17 signal ground handbook, halfpage IN+ 1 IN 2 C1 3 MODE 4 C1+ 5 PGND1 6 OUT+ 7 DIAG 8 V P1 9 V P2 10 OUT 11 PGND2 12 C2+ 13 V ref 14 C2 15 STAT 16 SGND 17 MGL263 Fig.2 Pin configuration. 1998 Apr 07 4
FUNCTIONAL DESCRIPTION The contains a mono class-h BTL output power amplifier. At low output power, up to 18 W, the device operates as a normal BTL amplifier. When a larger output voltage swing is required, the internal supply voltage is lifted by means of the external electrolytic capacitors. Due to this momentarily higher supply voltage the obtainable output power is 70 W. In normal use, when the output is driven with music-like signals, the high output power is only needed during a small percentage of time. Under the assumption that a music signal has a normal (Gaussian) amplitude distribution, the reduction in dissipation is about 50% when compared to a class-b output amplifier with the same output power. The heatsink should be designed for use with music signals. If the case temperature exceeds 120 C, the device will switch back from class-h to class-b operation. The high power supply voltage is then disabled and the output power is limited to 20 W. When the supply voltage drops below the minimum operating level, the amplifier will be muted immediately. Mode select input (pin MODE) This pin has 3 modes: 1. LOW, standby : the complete circuit is switched off, the supply current is very low 2. MID, mute : the circuit is switched on, but the input signal is suppressed 3. HIGH, on : normal operation, the input signal is amplified by 26 db. When the circuit is switched from mute to on or vice versa the actual switching takes place at a zero crossing of the input signal. The circuit contains a quick start option, i.e. when it is switched directly from standby to on, the amplifier is fully operational within 50 ms (important for applications like car telephony and car navigation). Status I/O input (pin STAT) INPUT This input has 3 possibilities: 1. LOW, fast mute : the circuit remains switched on, but the input signal is suppressed 2. MID, class-b : the circuit operates as class-b amplifier, the high power supply voltage is disabled, independent of the case temperature 3. HIGH, class-h : the circuit operates as class-h amplifier, the high power supply voltage is enabled, independent of the case temperature. When the circuit is switched from fast mute to class-b/h or vice versa the switching is immediately carried out. When the circuit is switched from class-b to class-h or vice versa the actual switching takes place at a zero crossing of the input signal. OUTPUT This output has 3 possibilities: 1. LOW, mute : acknowledge of muted amplifier 2. MID, class-b : the circuit operates as class-b amplifier, the high power supply voltage is disabled, caused by the case temperature T c > 120 C 3. HIGH, class-h : the circuit operates as class-h amplifier, the high power supply voltage is enabled, because the case temperature T c < 120 C. When the circuit is switched from class-b to class-h or vice versa the actual switching takes place at a zero crossing of the input signal. The status I/O pins of maximum 8 devices may be tied together for synchronizing purposes. 1998 Apr 07 5
handbook, full pagewidth supply voltage on mute 0 HIGH mode select input MID LOW V ref reference voltage VRT 0 HIGH status I/O input MID LOW status I/O output HIGH MID LOW class-h (T c < 120 C) class-b (T c > 120 C) output voltage across load 0 quick start mute zerocross change class B/H-operation fast mute function zerocross mute function supply mute function MGL272 Fig.3 Switching characteristics. 1998 Apr 07 6
Diagnostic output (pin DIAG) DYNAMIC DISTORTION DETECTOR (DDD) At the onset of clipping of the output stages, the DDD becomes active. This information can be used to drive a sound processor or DC-volume control to attenuate the input signal and so limit the distortion. SHORT-CIRCUIT PROTECTION When a short-circuit occurs at the outputs to ground or to the supply voltage, the output stages are switched off. They will be switched on again approximately 20 ms after removing the short-circuit. During this short-circuit condition the diagnostic output is continuously LOW. When a short-circuit occurs across the load, the output stages are switched off during approximately 20 ms. After that time is checked during approximately 50 µs whether the short-circuit is still present. During this short-circuit condition the diagnostic output is LOW for 20 ms and high for 50 µs. The power dissipation in any short-circuit condition is very low. TEMPERATURE DETECTION Just before the temperature protection becomes active the diagnostic output becomes continuously LOW. Load detection: directly after the circuit is switched from standby to mute or on, a build in detection circuit checks whether a load is present. The results of this check can be detected at the diagnostic output, by switching the mode select input in the mute mode. Since the diagnostic output is an open collector output, more devices can be tied together. handbook, full pagewidth mode select input HIGH MID LOW output voltage across load 0 HIGH diagnostic output LOW no load clipping signal short-circuit to supply or ground short-circuit across load t MGL265 Fig.4 Diagnostic information. 1998 Apr 07 7
handbook, full pagewidth class-h status I/O: high maximum output voltage swing class-b status I/O: open 0 HIGH diagnostic output LOW HIGH status I/O output MID LOW 100 120 145 150 160 T j ( C) MGL266 Fig.5 Behaviour as a function of temperature. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT V P supply voltage operating 18 V non-operating 30 V load dump; t r > 2.5 ms; 45 V T = 50 ms I OSM non-repetitive peak output current 10 A repetitive peak output current 8 A V sc short-circuit safe voltage 18 V T stg storage temperature 55 +150 C T amb ambient temperature 40 C T j junction temperature note 1 150 C P tot total power dissipation 60 W Note 1. T j is a theoretical temperature which is based on a simplified representation of the thermal behaviour of the device. T j =T c +P R th(j-c), where R th(j-c) is a fixed value to be used for the calculation of T j. The rating for T j limits the allowable combinations of power dissipation P and case temperature T c (in accordance with IEC 747-1). 1998 Apr 07 8
THERMAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS VALUE UNIT R th(j-c) thermal resistance from junction to case 1.5 K/W R th(j-a) thermal resistance from junction to ambient in free air 40 K/W DC CHARACTERISTICS V P = 14.4 V; R L =4Ω; T amb =25 C; measurements in accordance with Fig.10; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supplies V P1 and V P2 (pins 9 and 10) V P supply voltage 8 14.4 18 V V th+ supply threshold voltage mute on 9 V V th supply threshold voltage on mute 7 V V PH1 hysteresis (V th+ V th ) 200 mv I q quiescent current on and mute; 110 150 ma R L = open circuit I stb standby current standby 1 50 µa Amplifier outputs OUT+ and OUT (pins 7 and 11) V O DC output voltage on and mute 6.5 V V OO output offset voltage on and mute 100 mv V OO delta output offset voltage on mute 30 mv Mode select input MODE (pin 4) V I input voltage range 0 V p V I I input current V MODE = 14.4 V 20 µa V th1+ threshold voltage standby mute 2 V V th1 threshold voltage mute standby 1 V V msh1 hysteresis (V th1+ V th1 ) 200 mv V th2+ threshold voltage mute on 4.2 V V th2 threshold voltage on mute 3.3 V V msh2 hysteresis (V th2+ V th2 ) 200 mv Status I/O STAT (pin 16) PIN STAT AS INPUT V st input voltage 0 V P V I sth HIGH-level input current V STAT = 14.4 V 4 ma I stl LOW-level input current V STAT =0V 400 µa V th1+ threshold voltage fast mute class B 2 V V th1 threshold voltage class B fast mute 1 V V sth1 hysteresis (V th1+ V th1 ) 200 mv V th2+ threshold voltage class B class H 4.2 V V th2 threshold voltage class H class B 3.3 V V sth2 hysteresis (V th2+ V th1 ) 200 mv 1998 Apr 07 9
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT PIN STAT AS OUTPUT I st(mute) mute acknowledge sink current 2.2 ma V st(mute) mute acknowledge output voltage I st = 2.2 ma 0.5 V I st(clb) class B operation output current 15 µa V st(clb) class B operation output voltage I Ist =15µAI 2.0 3.0 V I st(clh) class H operation source current 140 µa V st(clh) class H operation output voltage I st = 140 µa V P 2.5 V T c(th) threshold case temperature sensor 120 C Diagnostic output DIAG (pin 8) V DIAG output voltage active LOW 0.6 V R L load resistance for open load 100 Ω detection T j(th) threshold junction temperature sensor 145 C 1998 Apr 07 10
V th1 V th1+ V th2 V th2+ MGL268 V th1 V th1+ V th2 V th2+ MGL269 Philips Semiconductors handbook, full pagewidth on-mode fast mute V PH1 V P V th V th+ MGL267 Fig.6 Supply voltage transfer characteristic. handbook, full pagewidth on-mode mute standby V msh1 V msh2 Vms Fig.7 Mode select transfer characteristic. handbook, full pagewidth class-h class-b fast mute V sth1 V sth2 V st Fig.8 Status I/O transfer characteristic. 1998 Apr 07 11
AC CHARACTERISTICS V P = 14.4; R L =4Ω; R s =0Ω; f = 1 khz; T amb =25 C; measurements in accordance with Fig.10; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT P o output power class-b; THD = 10% 16 20 W class-h; THD = 10% 60 70 W class-h; THD = 0.5% 45 55 W f ro(h)(p) high frequency power roll-off P o ( 1 db); THD = 0.5%; note 1 20 khz THD total harmonic distortion P o =1W 0.03 % P o =20W 0.06 % DDD active 10 % G v voltage gain 25 26 27 db f ro(h)(g) high frequency gain G v ( 1 db); note 2 20 khz roll-off Z i(dif) differential input 90 150 kω impedance SVRR supply voltage ripple on and mute; note 3 60 70 db rejection standby; note 3 90 db CMRR common mode rejection on; note 4 70 80 db ratio ISRR input signal rejection mute; note 5 80 90 db ratio V n(o) noise output voltage on; note 6 100 150 µv mute; notes 6 and 7 60 µv Notes 1. The low frequency power roll-off is determined by the value of the electrolytic lift capacitors. 2. The low frequency gain roll-off is determined by the value of the input coupling capacitors. 3. Supply voltage ripple rejection is measured across R L ; V ripple =V ripple max.=2v PP. 4. Common mode rejection ratio is measured across R L ; Vcm=Vcmmax.=2V PP. CMMR [db] = differential gain (G v ) + common mode attenuation (Ac), (Test setup according Fig. 9; mismatch of input coupling capacitors excluded). 5. Input signal rejection ratio is measured across R L ; V i =V i(max) =2V PP. ISSR [db] = different gain (G v ) + mute attenuation (Am) 6. Noise output voltage is measured in a bandwidth of 20 Hz to 20 khz. 7. Noise output voltage is independent of source impedance R s. 1998 Apr 07 12
handbook, full pagewidth + V P C i 1 9 supply 10 7 C i 2 TDA1562 11 R L V CM 14 SGND PGND1 PGND2 17 6 12 GND MGL270 Fig.9 CMRR test setup. QUALITY SPECIFICATION Quality in accordance with SNW-FQ-611 part E, if this type is used as an audio amplifier. 1998 Apr 07 13
This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.this text is here in _white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.this text is here inthis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be... 1998 Apr 07 14 status I/O mode select 100 nf 1/2*R s audio source 1/2*R s 100 nf 10 µf 16 4 1 IN+ 2 IN 14 V ref 17 signal GND CLASS-B CLASS-H FAST MUTE STANDBY MUTE ON 75 kω 75 kω 15 kω reference voltage + AMP. FEEDBACK CIRCUIT AMP. + TEMPERATURE SENSOR disable C1 POWER- STAGE handbook, full pagewidth V P * POWER- STAGE disable C2 4700 µf 3 5 LIFT-SUPPLY V P * LIFT-SUPPLY C1+ LOAD DETECTOR 15 13 6 4700 µf C2+ Fig.10 Test and application circuit. V P1 PGND1 9 10 LOAD DUMP PROTECTION CURRENT PROTECTION DIAGNOSTIC INTERFACE DYNAMIC DISTORTION DETECTOR TEMPERATURE PROTECTION 100 nf V P2 12 7 OUT+ + VP 2200 µf 10 kω R L = 8 4 Ω diagnostic 11 PGND2 OUT + V P GND MGL271 TEST AND APPLICATION INFORMATION Philips Semiconductors
PACKAGE OUTLINE DBS17P: plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1 D non-concave x Dh E h view B: mounting base side d A 2 B j E A L 3 L Q c v M 1 17 Z e e1 b p w M m e2 0 5 10 mm scale DIMENSIONS (mm are the original dimensions) UNIT A A 2 b p c D (1) d D E (1) e e 1 Z (1) h e 2 E h j L L 3 m Q v w x mm 17.0 15.5 4.6 4.2 0.75 0.60 0.48 0.38 24.0 23.6 20.0 19.6 12.2 10 2.54 11.8 1.27 5.08 6 3.4 3.1 12.4 11.0 2.4 1.6 4.3 2.1 1.8 0.8 0.4 0.03 2.00 1.45 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE SOT243-1 95-03-11 97-12-16 1998 Apr 07 15
SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our IC Package Databook (order code 9398 652 90011). Soldering by dipping or by wave The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact with the joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (T stg max ). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. Repairing soldered joints Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 C, contact may be up to 5 seconds. DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. 1998 Apr 07 16
NOTES 1998 Apr 07 17
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The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 545102/1200/01/pp20 Date of release: 1998 Apr 07 Document order number: 9397 750 03043